Use of different limestone and chalk powders in self-compacting concrete

Zhu, Wenzhong; Gibbs, John C.

doi:10.1016/j.cemconres.2004.07.001

Cited by 148 publications

(48 citation statements)

References 3 publications

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“…6) show that mixtures containing limestone powder developed higher compressive strengths at both 7-day and 28-day compared to those mixtures with slag + silica fume or fly ash + silica fume. Similar observations have been made by Zhu et al [17]. The SCC1 had the highest 28-day compressive strength among all the mixtures with a value of 61.8 MPa followed by SCC2 and SCC3 with values of 61.73 and 58 MPa, respectively.…”

Section: Compressive Strengths and Correlationssupporting

confidence: 77%

Effects of Aggregate Grading and Admixture/Filler on Self-Consolidating Concrete

Bhattacharya¹,

Ray

Davalos³

2008

TOBCTJ

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Self-consolidating concrete (SCC) is becoming a popular choice in concrete industry due to ease of placement in congested reinforcements, reduced labor and equipment, nonsegregating character, and smooth surface. Due to its sensitivity to aggregate grading, proportions, admixtures, and filler contents and being a relatively new material, more information are required on the effects of aggregate grading, mineral admixture types, and fillers on fresh and strength properties.In this paper a total of 10 SCC were investigated to compare the effects of aggregate size and distribution, mineral admixture, and filler on fresh properties through slump-flow, J-ring, L-box, column segregation, and compressive strength tests. Results show that combined aggregate distribution is critical for selecting proper SCC mixtures. Water/powder ratio and paste volume has more effects on SCC than water-cementitious material ratio. In general SCC properties can be greatly influenced by admixture types and dosage, and filler.

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Section: Compressive Strengths and Correlationssupporting

confidence: 77%

Effects of Aggregate Grading and Admixture/Filler on Self-Consolidating Concrete

Bhattacharya¹,

Ray

Davalos³

2008

TOBCTJ

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“…When further increasing the dosage of LP to 30%, the workability of the mixtures is slightly decreased. Improvement on the fresh behavior of pastes were also observed in PC based materials after incorporating LP [31,32]. This can be contributed by two mechanisms.…”

Section: Flowabilitymentioning

confidence: 87%

Assessing the chemical involvement of limestone powder in sodium carbonate activated slag

Yuan

Brouwers

2017

Mater Struct

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This study aims to investigate the effect of limestone powder (LP) on the reaction of sodium carbonate activated slag. The results show that the incorporated LP up to 30% improves the strength development, especially at advanced curing ages. A slightly accelerated reaction is observed for samples containing low amount of LP (B5%), while mixture with 10% LP shows the optimized results with respect to the heat release and strength development. Chemical effect of incorporating LP is observed at high replacement levels (C15%), indicated by the formation of a new phase, natron (Na 2 CO 3 Á10H 2 O). Besides, relatively high contents of hydrotalcite-like phases are generated when increasing the dosage of limestone powder. The chemical changes, including the volume changes of generating natron and the transformation of natron to calcite, is potentially responsible for the enhanced mechanical properties.

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“…Generally, the presence of fracture microfines in manufactured sands has different impacts on the performance of concrete or mortar. Non-clay powders such as limestone (Zhu 2005), slag (Al-Jabri 2009;Yazıcı 2008), fly ash (Yazıcı 2008;Jaturapitakkul 2004), etc. have been used successfully in concrete.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Wang

Zheng

Feng³

et al. 2012

ACT

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The adsorption of polycarboxylate-based superplasticizer onto natural bentonite was investigated in aqueous solution using a batch technique with respect to initial adsorbate concentration, contact time, temperature, pH value and ionic strength. Lower pH value and higher ionic strength were proved to be favorable for the adsorption. The pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to describe the kinetic data and the kinetic constants were also determined. The experimental data fitted the pseudo-second-order model well. The Langmuir, Freundlich and Dubinin-Radushkevich (D-R) equations were applied to describe the equilibrium isotherm and the isotherm constants were also evaluated. The langmuir model agreed with the experimental well. Thermodynamic parameters ( Δ G 0 , Δ H 0 and Δ S 0 ) indicated that the adsorption was endothermic and physical in nature.

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Use of different limestone and chalk powders in self-compacting concrete

Cited by 148 publications

References 3 publications

Effects of Aggregate Grading and Admixture/Filler on Self-Consolidating Concrete

Effects of Aggregate Grading and Admixture/Filler on Self-Consolidating Concrete

Assessing the chemical involvement of limestone powder in sodium carbonate activated slag

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

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